Two (2) 6SN7GTB Sylvania vintage vacuum tubes, made in USA,

tubes have black ribbed plates, chromed domes, close date codes CK and DB (made in 1969 and 1970)

tubes tests: 

Price is for all tubes pictured.

We test all tubes we sell! We will combine shipping! Check out my other tubes!

Tubes are tested for emission, as well as for shorts, life test and grid leakage on calibrated Sencore Mighty Mite tube tester,

on scale 1-120, good quality on my Sencore starts at 70.